On a post-apocalyptic Earth, the largest cities thrived, courtesy of engineering breakthroughs that turned their land masses into mobile juggernauts-and allowed them to prey upon smaller communities for their resources. Fate would cast two mismatched teens-historian Tom (Robert Sheehan) and scarred, embittered rebel Hester (Hera Hilmar)-out of London and into a flight for their lives in this visually stunning read on Philip Reeve's steampunk saga.